Quantification of Triple-Shape Memory Behavior of Polymers Utilizing Tension and Torsion

Meurer, Josefine; Agudo, José Alberto Rodriguez; Zechel, Stefan; Hager, Martin D.; Schubert, Ulrich S.

Abstract:

Shape-memory polymers (SMPs) are well investigated smart materials. With their ability to memorize their original shape they are interesting candidates for a large range of applications. Certain SMPs feature triple shape-memory behavior. In these cases, it is possible to fix two different temporary shapes. However, the exact quantification of the individual steps regarding their programming and recovery rate is difficult and has not been possible so far. In this work, a novel approach for the analysis and exact quantification of triple SMPs is presented. By applying a customized rheology protocol, it is possible to perform and to analyze torsional and tensional experiments simultaneously. Consequently, different shapes in different directions (vertical and horizontal) can be fixed and the individual steps can be investigated independently at different switching temperatures.

Year:

2021

Type of Publication:

Article

Journal:

Macromolecular Chemistry and Physics

Volume:

222

Pages:

2000462

DOI:

https://doi.org/10.1002/macp.202000462